半脊荠 ban ji ji

Stems from rhizomes, few to many, 4-15 cm, puberulent throughout with minute, crisped, simple and forked trichomes to 0.06 mm. Basal leaves not seen. Cauline leaves with petioles 1-3 mm; blade oblanceolate or narrowly elliptic, 3-6 × 1.5-3 mm, glabrous or rarely sparsely pilose with nonsetose trichomes, margin entire, apex subacute. Racemes elongated considerably in fruit. Fruiting pedicels straight or slightly curved, divaricate, 3-7 mm, puberulent with crisped minute trichomes. Sepals ovate, greenish, tardily caducous, not saccate, 1-1.5 × 0.7-1 mm, glabrous or sparsely puberulent, margin ciliate with trichomes ca. 0.05 mm, membranous part to 0.2 mm wide. Petals pink, caducous, narrowly obovate, 2.5-3.5 × 1.5-2 mm, cuneate to a clawlike base, apex shallowly emarginate. Filaments pinkish, lateral pair 1-1.3 mm; median pairs 1.2-1.6 mm, not appendaged, base 0.2-0.3 mm wide; anthers yellow, 0.3-0.4 mm. Immature fruit ca. 2.5 × 1.5 mm, with a crest of tubercles surrounding margin and extending along midvein; gynophore absent; style stout, cylindric, minutely papillate throughout, to 1 mm. Seeds not seen. Fl. Jul-Aug.

* Loose limestone gravel; 4000-4700 m. Yunnan.